Method for producing the sustained-releasing agricultural chemicals

Abstract

The invention relates to a method for producing sustained-releasing agricultural chemicals. The effective ingredients of the agricultural chemicals are absorbed into a carrier and are released sustainedly. The effect of a injection last about 30 to 40 days, and the concentration of the agricultural chemicals is enough to have an effect. The agricultural chemicals of this invention may save the farmers' labor, reduce costs caused by continuous injections, and decline environmental contamination as an environmentalfriendly agricultural chemicals.

What is claimed is:  
     
         1 . A process for preparing sustained-releasing agricultural chemicals containing phosphorous acid salt, which comprises: 
 a solution collection step: adding an effective component of agricultural chemicals in a ratio of 1˜100 g per 100 ml of solvent, dissolving and collecting a solution containing said effective component;    an impregnation drying step: adding a porous carrier in a ratio of 0.5˜2.0 kg per 100 ml of said solution containing said effective component of said agricultural pesticide, mixing homogeneously, drying to form an adsorption carrier containing said effective component; and,    a coating step: adding a suspension containing 0.5˜15 g of polysaccharides obtained from microorganism per 1 kg of said adsorption carrier containing said effective component of said agricultural chemicals dried above.    
     
     
         2 . A process for preparing sustained-releasing agricultural chemicals, which comprises: 
 a dissolution step: adding an effective component of agricultural chemicals in a ratio of 1˜100 g per 100 ml of solvent and polysaccharides derived from microorganism in a ratio of 0.5˜15 g per 100 ml of solvent, dissolving sufficiently and collecting a polysaccharide solution containing said effective component of said agricultural chemicals; and,    an impregnation drying step: adding a porous carrier in a ratio of 0.5˜2.0 kg per 100 ml of said polysaccharide effective component containing solution, mixing homogeneously, drying to form an adsorption carrier containing said effective component of agricultural chemicals.    
     
     
         3 . The process for preparing sustained-releasing agricultural chemicals according to  claim 1  or  claim 2 , in which an effective component is one substance or a mixture of more than two substances selected from the group comprising phosphorous acid salt, acephate, isoxathion, imidacloprid, ethylthiodemeton, ethofenprox, bitanol, cartap, carbosulfan, clofentezine, cyclopyrifas-methyl, fenbutatin-oxide, cycloprothrin, dimethylrinphos, dimethoate, silafluofen, diazinon, thiodicarb, thiocyclam, tebufenozide, nitenpyram, vamidothion, bifenthrin, pyridaphenthion, pyridaben, pyrimiphos-methyl, fipronil, phenisobromolate, buprofezin, furathiocarb, propafos, bensultap, benfuracarb, formothion, malathon, monocrotophos, BPMC, CVMC, DEP, EPN, MEP, MIPC, MPP, MTMC, NAC, PAP, PHC, PMP, XMC, acibenzolar-S-methyl, azoxystrobin, isoprothiolane, isoprodion, iminoctadine triacetate, oxolinic acid, oxone-copper, kasugamycin, carpropamid, captan, diclomezine, thiabendazole, thifluzamide, tecloftalam, tricyclazole, validamycin, hydroxyisoxazole, pyroquilon, fenarimol, ferimzone, fthalide, blasticidin, polyoxin, methasulfocarb, matalaxyl, metalaxyl-M, metominostrobin, mepronil, ampiciline, CNA, IBP, DF-351, NNF-9425, NNF-9850, azimsulfuron, atrazine, ametryn, inabenfide, imazosulfuron, nuiconazole, esprocarb, etobenzanid, oxadiazon, cafenstrole, quizalofop-ethyl, quinclorac, cumylron, chlomethoxynil, cyclosulfamuron, dithiopyr, cinosulfuron, cyhalofop-butyl, simazine, dimetametryn, dimepiperate, cinmethylin, dymron, thenylchor, triapenthenol, naproanilide, paclobutrazol, bifenox, piperophos, pyrazoxyfen, pyrazosulfuron-ethyl, pyrazolate, pyributicarb, pyriminobac-methyl, butachlor, butamifos, pretilachlor, bromobutide, bensulfuron-methyl, benzofenap, bentazon, benthiocarb, pentoxazone, benfuresate, mefenacet, molinate, Jasmon acid (JA), salicylic acid (SA), BABA, BTH, ACN, CNP, 2,4-D, MCPB and MCPB-ethyl.  
     
     
         4 . The process for preparing sustained-releasing agricultural chemicals according to  claim 1  or  claim 2 , 
 in which said porous carrier is one substance or a mixture of more than two substances selected from the group comprising zeolite, pearlite, vermiculite, diatomite, ceramic and activated charcoal.  
 
     
     
         5 . The process for preparing sustained-releasing agricultural chemicals according to  claim 1  or  claim 2 , in which said polysaccharide derived from microorganism is one substance or a mixture of more than two substances selected among the group comprising pestan, levan, zanthangum, pullulan, polysaccharide-7, cellulose, zooglan, gelan and curdlan.